A colloquial contraction for can not.

Yes: you think I can't; but I can. – You-Never-Can-Tell by Shaw, Bernard

" Can't we do anything? – With Haig on the Somme by D. H. Parry

Can't you hear me speak, Ulenspiegel? – The Legend of the Glorious Adventures of Tyl Ulenspiegel in the land of Flanders and elsewhere by Charles de Coster

I say I can't. – Kent Knowles: Quahaug by Joseph C. Lincoln

No, I can't say that I'm for Altacoola. – A Gentleman from Mississippi by Thomas A. Wise

Can't we do it now?" – The Pursuit of the House-Boat by John Kendrick Bangs

Can't be- yes, they are! – The Blind Lion of the Congo by Elliott Whitney

You can't 'elp it." – Adventures of Bindle by Herbert George Jenkins

When I go back home, you know, I can't have it. – A Spinner in the Sun by Myrtle Reed

I can't see the use. – On With Torchy by Sewell Ford

I can't do it, I'll never do it! – The Flockmaster of Poison Creek by George W. Ogden

You can't, you know. – An Alabaster Box by Mary E. Wilkins Freeman and Florence Morse Kingsley

She can't come yet. – A Double Knot by George Manville Fenn

Why can't you come? – Three Plays by Padraic Colum

You- you can't mean it." – Flowing Gold by Rex Beach

Yes- because you can't help it. – The Letters of Robert Browning and Elizabeth Barrett Barrett, Vol. 1 (of 2) 1845-1846 by Robert Browning and Elizabeth Barrett Barrett

You can't really mean that?" – Blind Love by Wilkie Collins

" How d'you know we can't? – Laughing Bill Hyde and Other Stories by Rex Beach

Can't I say, 'Thank you'? – The Captain of the Gray-Horse Troop by Hamlin Garland

I can't see where you get them. – Chicken Little Jane by Lily Munsell Ritchie